OAA computing section circular NK 1174 P/2004 DO29 (Spacewatch-LINEAR)
The following improved orbital elements, by S. Nakano, are from 64 observations 2004 Feb. 11 to Apr. 20. Perturbations by Mercury to Neptune and three minor planets, Ceres, Pallas and Vesta, were taken into account. The mean residual is +/- 0.63 arc second. Epoch = 2004 Oct. 2.0 TT T = 2004 Oct. 9.18160 +/- 0.40521 (m.e.) TT Peri. = 41.56837 +/- 0.07424 Node = 147.77753 +/- 0.00244 (2000.0) Inc. = 14.49614 +/- 0.00400 q = 4.0972819 +/- 0.0014026 AU e = 0.4494246 +/- 0.0004970 a = 7.4418180 +/- 0.0009654 AU n' = 0.04854958 +/- 0.00000945 P = 20.301 +/- 0.0039502 years (+/- 1.44 day) The predicted orbit for the 2024 return is as follows: T = 2024 May 31.87510 TT Epoch = 2024 June 19.0 TT Peri. = 40.37501 e = 0.4420916 Node = 147.37478 (2000.0) a = 7.3092807 AU Inc. = 14.52586 n'= 0.04987606 q = 4.0779090 AU P = 19.761 years The following residuals in seconds of arc are from the above orbital elements: Date Code Residual(") Date Code Residual(") Date Code Residual(") 2004/ 040226 704 0.7+ 0.5+ 040319 704 0.9+ 0.0 040211 699 0.8- 0.0 040226 704 0.4- 0.2+ 040319 704 1.0+ 0.8+ 040211 699 0.7+ 1.2- 040315 703 0.2- 0.8+ 040319 213 0.5- 0.6+ 040211 699 (2.3- 0.6-) 040315 703 0.4+ 0.9+ 040320 360 0.3+ 0.0 040211 699 0.1+ 0.5+ 040315 703 1.0- 0.1+ 040320 360 0.2+ 0.5- 040217 691 0.3+ 0.4- 040315 703 0.1- 0.4- 040320 360 0.1- 0.1+ 040217 691 0.0 0.3- 040316 568 0.4+ 0.4- 040320 J87 0.4- 0.0 040217 704 1.4- 1.0+ 040316 568 0.3+ 0.5- 040320 J87 0.1+ 0.7- 040217 691 0.4- 0.4- 040316 568 0.5+ 0.5- 040320 J87 0.2- 0.3- 040217 704 0.6+ 0.3+ 040317 215 0.4+ 0.2- 040322 704 0.6+ 0.1+ 040217 704 0.6+ 0.9+ 040317 204 0.0 0.1+ 040322 704 1.8+ 0.9+ 040217 704 1.7+ 1.0+ 040318 204 0.2+ 0.2+ 040322 704 0.9- 0.0 040223 704 0.5+ 0.9- 040318 372 0.3- 0.5- 040326 703 0.2- 0.6+ 040223 704 0.1+ 0.9- 040318 360 0.2+ 0.3+ 040326 703 0.4- 0.3+ 040223 704 0.1- 0.2+ 040318 360 0.0 0.6- 040326 703 1.1- 0.2+ 040223 704 0.2- 0.3- 040318 360 1.1- 0.3- 040326 703 0.0 0.0 040223 704 0.2- 0.4- 040319 J87 0.5- 0.0 040412 213 (1.6- 2.1-) 040225 704 0.9- 1.2- 040319 J87 0.3- 0.3- 040412 213 1.5- 1.4- 040225 704 (1.3+ 2.3+) 040319 J87 1.3- 0.5- 040414 215 0.9- 0.6+ 040225 704 0.9- 0.5+ 040319 644 0.3+ 0.2+ 040420 360 0.4+ 0.0 040225 704 0.8- 0.1+ 040319 644 0.6+ 0.3+ 040420 360 0.6+ 0.1- 040225 704 0.8- 0.0 040319 644 0.3+ 0.4+ 040420 360 0.4+ 0.1- 040226 704 (2.2- 0.5+) 040319 704 1.6+ 0.1+ 040226 704 (2.2- 0.3+) 040319 704 1.0+ 0.6+ ( ) -------- Rejected Obs.
Director, Computing Section Syuichi Nakano 2005 Apr. 21